Apparatus for finishing tire tubes



' 1,640,077 A H. H. HASTINGS APPARAT S FOR FINISHING TIRE TUBES Filed June 1, 1926 Anownm Patented Aug. 23, 1927'.

UNITED STATES HORACE HILLYABD HASTINGS, OF QUEBEC, QUEBEC, CANADA.

APPARATUS FOR FINISHING TIRE TUBES.

Application filed June 1, 192a. Serial No. naeos.

The invention relates to an a paratus for finishing tire tubes as descn ed in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially of the novel features of construction pointed out broadly and specifically in the claim for novelty following a description in detail of an acceptable form of the invention.

The objects of the invention are to roduce an apparatus that will prove efiicient in carrying out the process as set forth in the copending application filed under serial No. @460, on January 24, 1925, to' insure a good joint in the reinforcing of that art of the tube wall most liable to the injurious effects of pinching and rim troubles; to furnish the means of accomplishing this purpose that will enable the manufacturer to join the transverse ends of the tube wall to insure integrality for the tube and the reinforcing strip after the operation is finished; to facilitate the vulcanization of tube parts; and generally to provide a device that will prove economical in respect to production and eflicient in regard to the article produced.

In the drawings, Figure 1 is a side elevation of the annular tube casing.

Figure 2 is a cross sectional view of the casing showing the tire enclosed therein and taken on the line 2-2 in Figure 1. V

Figure 3 is a cross sectional view on the line 3+3 in Figure 1.

Figure 4 is a cross sectional view on the line 44 in Figure 1.

Figure 5 is a sectional view on the line 5-5 in Figure 3.

Figure 6 is an elevation of one half of the casing containing the tube.

Figure 7 is a cross sectional view of the tube wall in process of being turned.

Figures 8 and 9 are fragmentary sectionall details of the steam chamber.

Figure 10 is ,a cross sectional view of the tube ready for the casing.

Figure 11 is a cross sectional view of the tube after treatment in the casing Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the casing 12 is made in the halves 13 and 14 and is in hollow ring form and split circumferentially and having the lugs 15 and 16 respectively at intervals through which the bolts 17 are insertedto hold the halves together.

The walls of the halves 13 and 14 are slightly thicker on theinner sides and adjoining the split have the annular recesses 18 and 19 enclosing when the surface finv ished faces 20 and 21 of the halves l3 and 14 are brought together ,a steam vulcanizing chamber 22 into which the passage 23 leads from the outer periphery for the introduction of the steam inlet pipe 24, which is connected to a steam supply.

The chamber 22 is centrally interrupted by the air valve 25, which is enclosed by the passage 20 in parts from the halves l3 and 14.

The safety valve 27 is inserted in the passage 28 through the steam chamber wall and provides for any contingencies due to 1 increased pressure. The tire tube 29 of rubber is preferably of the self healing type having the pocket plastic substance 30 and in the making skived at the transverse ends 31 and 32, the tube Well being turned in-. side out and ends 31and 32 being brought together and overlapped and secured by cement.

The tube 29 is placed inthe casing 12 and inflated with air sufliciently to comfortably fill the said casing, but previously the reinforcing strip 33 has been cemented over the joint formed by the overlapped ends 31 and 32 and this strip is opposite the steam chamber 22; consequently on turning steam into said chamber, the overlapped ends and the reinforced strip are vulcanized so that the tube wall at the joint is integral and at the same time mechanically thickened in order to produce greater strength, where increased durability is most desired.

What I claim is y In an apparatus for finishing tire tubes, an annular tube chamber recessed to contain an annular steam chamber havin a steam inlet said tube chamber being a apted to enclose and restrict undue expansion of a tire tube and bring the reinforced wall thereof into register with said annular steam chamber. V

Signed at Montreal, Canada, thislOth day of May, 1926.

HORACE HILLYARD HASTINGS. 

